Selective actuating mechanism



R. B. SMITH.

SELECTIVE ACTUATING MECHANISM.

APPLICATION FILED Aue.2I. I916. RENEWED Nov 17.1919.

1,350,575 Patented. Aug. 24, 1920.

2 SHEETS-SHEET I.

R. D. SMITH.

SELECTIVE ACTUATING MECHANISM.

APPLICATION FILED AUG.ZI, I916. RENEWED NOV. 17.1919.

1 ,350,575. Patented Aug. 24, 1920. i

2 SHEETS-SHEET Z.

UNITED STATES PATENT OFFICE.

RAYMOND D. SMITH, OF MILTON, MASSACHUSETTS, ASSIGNOR TO TREMONT PRODUCTSCOMPANY, OF BOSTON, MASSACHUSETTS, A COR PORATION OF MASSACHUSETTS.

I SELECTIVE ACTUATING MECHANISM.

Specification of Letters Patent.

Patented A11 24, 1920.

Application filed August 21, 1916, SerialNo. 116,099. Renewed November17, 1919. Serial No. 338,674.

To all who/a it may concern Be it known that I, RAYMOND D. SMITH, acitizen of the United States, residing at Milton, in the county ofSuffolk and State of Massachusetts, have invented certain new and usefulImprovements in Selective Actuating Mechanism, of which the following isa specification.

My invention relates to actuating means for a rotative, reciprocativecontrol device or element (such as, for example, a rotary valve member)wherein by reciprocative rotation through a limited number of degrees,

- the device (or valve member) effects appropriate controlof someultimate means (6. g. opens or closes valve ports) as desired. With suchdevices or elements it is sometimes desired to have free movement inboth directions through a portlon, only, of the entire travel, and atother times to cause, at will,

a further movement in one direction, and

to have movement in the reverse direction thereafter effectedautomatically; for which purpose means are provided whereby the deviceor element is maintained by a stop or detent against such movement insaid reverse direction, and whereby tension is established to cause suchmovement auto matically after a desired time interval; the

stop, or detent, being then automatically retracted.

It is convenlent to combine the device or element and the automaticactuating means,

with simple, oscillatory control extensions (which may be concentricallyand adjacently pivoted for purposes of compactness,

and suitably interrelated) whereby desired operation of the element ordevice in both directions is primarily secured or governed. In such anarrangement I have found it advantageous to provide external of themechanism, for convenient manual actuation thereof, a plurallty ofcords, chains or other extension members appropriately;

guided or interconnected at their ends so as to plainly indicate, bytheir positional relation, the rotative position of said control deviceor element. One of such cords or chains (to wit: that cord adapted bysuitable actuation thereof to cause said further movement of the controldevice or element whereby I use, it will be obvious that, when so used,a

of special nature and independent in operation of'the other cords orchains, so that said free partialmovement of the control device may behad independent of said special cord.

The particular embodiment of my invention herein chosen for illustrativepurposes only is adapted for use with illuminating gas burners; and,although the scope of my invention is by no means confined to suchspecific object thereof is to provide simple, and preferablyreciprocating, manual control means for the valve governing the supplyof gas to such burner;wherehy said valve may be opened and closed by theusual reciprocative actuation of conventional control means and whereby,further, suitable actuation of associated additional control means mayput said valve under control of automatic means for causing a delayedclosure.

Other details and objects of my invention will appear from the drawings,description and claims hereof.

In the drawings: Figure 1 is a front view of a structurally combinedopen flame gas burner and controlling valve therefor, together withmechanism for actuating said valve, in which mechanism is embodied oneform of my presentinvention, the casing for the mechanism being omitted,and parts shown in position to permit normal operation of the mainburnergFig. 2 is a view in elevation looking at the right of Fig. 1,with the mechanism casing broken away; Fig. 3 is an enlarged partialsection taken on the vertical plane 33 in Fig. 2, showing thearrangement of operative valve ports and their relation when theilluminating burner is extinguished; Fig. 4 is a section similar to Fig.3, but showing the relation of ports during normal operation of theilluminating burner;-.Fig. 5' shows therelation of ports after manualactuation adapted to cause delayed automatic closure of the valve; Fig.6 is an enlarged plan view of the valve actuating mechanism taken partlyin section on the horizontal plane 6 6 in Fig, 8; Fig. 7 is an enlargedfront view of the mechanism shown in Fig. 1, the parts being shown intheir positions after manual actuation adapted to cause delayedautomatic closure of the valve; Fig, 8 shows a position of parts dur-jfront view of the modified mechanism shownin Fig. 9, the parts beingshown positioned similarly to the corresponding parts in Fig. 1; Fig. 13is diagrammatic and indicates a different operative position of thecontrol arrangement shown in Fig. 10; Fig. 14, also diagrammatic,indicates a still different position of this control arrangement.

Throughout the drawings and in the following description, similar partsare designated by like numerals.

. In Fig. 1, the flame of the main burner appears at 10. The usualburner stem 11 is shown mounted upon a valve block 12, which blockcontains the usual tapered valve plug 15 lying horizontally transverseof the upright main gas passage 18, and adapted, in the usual manner byrotation,- to govern the supply of gas to the burner. The valve plug 15has a stem 30 extending forwardly and axially from its smaller end, andcarrying fixed thereto, two opposite radial arms 34 and 35. v

The arm 23% carries, pivoted thereto, a bell crank check lever 26normally maintained by a spring 411 against a rearwardly projecting stop51 on the arm 34 and positioned, as shown in Figs. 1 and 8 to rcleasablyengage with a stationary abutment 54 and to thereby limit the clockvvise swing of the radial arm 34- to substantially a horizontalposition. A control cord 65 is shown attached to the end of arm 34.

The arm 35 carries pivoted to its end a bell crank latch (36, suitablylimited in its movement and yieldingly held in a position by the spring73 such that a forwardly bent end 67 of the latch may be .releasa-blyengaged by a dog arm 78, which dog arm forms one of three, operative,radial extensions of a dog member 36. The dog member 36 is looselymounted on the valve stem 30, and is retained thereon by a screw 42 inthe end of the latter. Such engagement oi the latch 66 by the dog arm78, as shown in Figs. 7 and 8, enables the dog arm, upon suitableactuation thereof, to positively rotate the arm 35 in a.counter-clockwise direction in Fig. 7; but release from such engagementmay be had, at will, by a downward pull upon the cord 68 whichact-nation as indicated by broken lines in Fig. 1, first disengages thelatch 66, from the dog arm 78 and then may act to positively swing thearm 35 clockwise in Fig. 1, independent of the dog member 36.

The dog member 36 has diametrically opposite the dog arm 78, a trip arm27, with a rearward extension .37 near its end, adapted upon clockwiserotation of the dog member 36, to first engage the check lever 26 toswing the upper end of same inwardly and out oi engagement with theabutment .545, after which the extension 37 may positively engage thearm to swing the latter in a clockwise direction to its position shownin Fig. 7. A spring 38 is loosely coiled around the hub of dog member 36and is connected thereto and to a post 29 extending forwardly from thesupporting plate 31, to normally maintain the dog member positioned asin Fig. 1 where the trip arm 27 is held in contact with the post 29.

A grooved drum segment 39 is carried by the dog member 36 and guides athird control cord 6-1 which latter is made fast to the dog member by apin 63. The cord 6&1 extends downwardly through a guiding bellmouth 62and affords convenient means for manually rotating the dog member in aclockwise direction against the action of the spring 38, when desired. v

The dog member 36 carries at the extremity of a thirc extension 45,there. (which extension is axially separated from the arms 27 and 78 bya connecting hub) a yoked latch member e16, pivoted thereto and arrangedto yield in only a counter-cloekwise direction in Fig. 7, against thetension of the small coiled spring 48.

Lying normally in the path of movement of the latch member 4:6 is a spurshaped detent 52, carried fast to the inner surface of a curved,bi-Inetallic thermostat 53, which latter is securely anchored by one endto a projecting abutment 54, extending lorwardly from the upright,circular supporting plate 31. This supporting plate is mounted rigidlyon the valve block 12 and carries a stationary roller abutment 61.internally adjacent to the free end of the thermostat and adapted toreinforce the latter against excessive flexural yielding when saidthermostat subjected to the thrust imparted by pressure of the latchmember 16 upon the spur detent as shown in Fig. 7. The thermostat isarranged to open, or straighten, upon being thermally energized, whichmovement it will be plain, retracts the detent 52 radially outwardly andaway from the path-3t movement of the latch member 46.

Clamped to the mounted end of the thermostat and extending rearwardlyfrom the same, is a mono-metallic, heat conducting member whichterminates as shown in Figs. ,1 and 2 in a hollow, hooded, or inverted,cup-shaped portion 57, adjacent to the burner stem 11 and external ofthe mechanism housing. This terminal hood has a small opening 58 at itstop and is entirely open at the bottom.

Directly under and slightly below this terminal portion of the heatconducting member 56, the fuel outlet of a small auxiliary heatingburner 21, structurally integral with the valve block 12, and of Bunsenburner construction with means therein for regulating the supply of gasthereto. As shown in Fig. 5, the valve plug 15 has an additional port 19adapted to register, in suitable rotative position of the former, with acorresponding port 20 in the valve block, which latter port leads to theburner 21. Gas may thus be delivered to the burner 21 under control ofthe valve plug 15, whereupon such gas will rise and ignite from the heatof the main flame 10, subsequently burning at the mouth of the burner 21with a hot blue flame from which heat may be transmitted to thethermostat by the heat conducting member 56. A casing 33, is provided tohouse the mechanism.

T 0. keep the control cords properly spaced and positioned and toincrease the convenience of their manipulation I may interconnect themin some suitable way, preferably near their terminals, as shown in Figs.1 and 2. Here the cords and 68 are shown provided at their ends withvertical links 69 carrying the ball terminals 70 and a rigid cross bar71 loosely pivoted at each end to one of these links.

A similar link 72 terminates the cord 64 but is slotted to permit freevertical movement thereof independent of the cords 65 and 68 and to beguided in such movement by engagement with a stud 74 on the cross bar71, being thus maintained properly spaced and separated from the othercords.

It will be evident, also, after further consideration of the operationof this device, that this arrangement of operatively independent, butconstructionally associated, controlling cord terminals offers a trueindication in all positions, of the positional relation of themechanical parts (which themselves are inclosed) and thereby of thecondition and position of the'controlled device.

Having thus described the construction of one form of a particular anduseful application of my present invention, I shall now explain theoperation thereof, assuming the parts to be positioned as shown bybroken lines in Fig. 1 where the valve ports are related as shown inFig. 3 and no gas is supplied to either the main or auxiliary burners,which therefor are inactive. When it be desired to light theilluminating burner the cord 68 is pulled downwardly, causing, in thepreviously described manner, a movement of the arm 35 and thereby of thevalve plug 15 to a position such for instance as shown by full lines inFigs. 1 and 4 where it will be clear that gas is delivered to theilluminating burner only, which burner may then be lighted and remain inoperation for an indefinite period of time. It will be clear thatfurther pull upon the cord'65 will be opposed by the check lever 26, butthat the arms 34 and 35 are entirely free for movement in eitherdirection between the positions thereof, shown by broken and by fulllines in Fig. 1; and therefore, that by manipulation of the cords 65 and68 in the conventional manner, complete control of the valve may be hadfrom a fully closed to a fully open position, independent of othermechanism present.

When, however, it be desired to elfect delayed automatic closure of thevalve (from whatever position the valve may occupy between its limits ofmovement as shown in Figs. 3 and 4), cord 64 may be pulled downwardly,which will cause clockwise rotation of the dog member against thetension of spring 38. During this rotation, as shown in Fig. 8, the endof dog arm 78 will latch under the end 67 of the latch 66 before thetrip arm 27 contacts with the check lever 26 to disengage the latterfrom the obstructing abutment 54 and thereby to release the arms 34 and85 for further clockwise movement of the valve.

Continued pull upon the cord 64 will then rotate both dog member 36 andthe arms 34 and 35 to the broken line position of dog member shown inFig. 7. Upon release of cord 64, the dog member will be rotated in thereverse direction by the tension in spring 38 until intercepted byengagement of its latch member 46 with the spur detent 52 whereupon theparts will be held in the position shown in Fig. 7, where the valveports are related as shown in Fig. 5 and where, it will be clear, thatgas is delivered to the auxiliary heating burner 21. This burner nowignites from the flame 10 as heretofore explained and acts to heat thethermostat. Upon being thus heated, the thermostat straightens or bendsgenerally outwardly, assuming after a certain time interval the positionindicated by broken lines in Fig. 7, wherein the detent 52 has beenretracted and the dog member 36 being thus released, is rotativelyimpelled by the spring 38 to its original position against its stop post29 as shown in Fig. 1, carrying with it the arm 35 and thereby returningthe valve to its closed position as shown in Fig. 3, where all gassupply to both the main and auxiliary burners has been stopped and suchburners consequently extinguished. It will be evident that the arm 35will now remain in this oil position until subsequent actuation to openthe valve, a separate stop post 7 9 being provided to prevent furthermovement of said arm in a counter-clockwise direction.

In Figs. 9, 10 and 12, I have shown. another possible, and equallysimple, arrangement of means for convenient manual control of the valveacting mechanism. Here it will be evident that the mechanism is similarto that shown in the ireceding figures, except that a radial armreplaces the grooved drum segment 39, and carries at its end, pivotedthereto by means oi a flat link 76, the dog member actuating chain 6st,which chain replaces and has the same function as the cord 64, in thepreceding figure. The arm 75 extends in a direction generally similar tothat of the valve arm 35 and is of such length that the chain 6% han ssubstantially adjacent to the chain (38. I have shown attached to theend of chain 64, a double, tubular terminal 77 through one portion ofwhich the control chain 63 may freely slide. The other control chain 65is terminated and connected to chain 68 in the manner of thecorresponding cord construction in Figs. 1 and 2, both said chains beingloosely pivoted at their point of connection to the mechanism arms.

Fig. 10 clearly shows the above described construction and the positionof chains and terminals as viewed independent of the valve actuatingmechanism, indicating that means have been energized and made active tocause a delayed extinguishment of the light, and indicating a positionof the valve ports as in'Fig. 5. Fig. 13, shows diagrammatically, theposition of this external controlling arrangement after automaticextinguishment of the light, or when the valve is closed as indicated inFig. 3. Fig. A indicates the positionot' these parts when the valve isfully open and the burner adapted for normal operation for an indefiniteperiod of time.

In Fig. 11, l have shown a detail of construction of a combined pivotand spring stud, the use of which in a device of this kind is especiallyadvantageous, because of its compactness, its ease of production, andits durability. The pivot is formed by an eyelet 80, fixedly riveted tothe check lever 26 and having a loose bearing in the arm 34, in whichbearing it is retained by the eyelet head 81. The hollow center of theeyelet is utilized for tightly mounting therein a spring stud 82, havinga thin head 83 which loosely retains the wire spring 41, carriedthereunder. Other details of construction and advantageous arrangementof parts for yielding compactness, durability and simplicity will beapparent from the drawings.

It will be evident to those skilled in the art, that the particularembodiment of my invention disclosed herein is but one of many possibleapplications of the principles and spirit thereof, such means ofaccomplishing such multiple functions by simple, selective andassociated control means, being advantageous to diverse mechanismentirely foreign to the control of gas flow. -V'Vithout therefore,limiting the scope of my invention to the precise embodiment hereindisclosed, what I claim as new is 1. ln combination with a rotary deviceadapted for limited reciprocative movement; a. member pivotedconcentrically with said device and arranged cooperatively for drivingengagement with same, said member and said device being disengageable topermit independent reciprocation of said device relative to said memberwhen the latter is in its normal position; a resilient connectiontending to impel said member to its said normal position thereby toactuate said de vice; and releasable latch detent means normallyarranged to catch and hold said member displaced from its said normalposition and tensioned by said resilient connection.

2. Actuating means for a rotary device adapted for reciprocativemovement, embodying, in combination with said device; releasable meansnormally arranged to check full movement of said device in onedirection; normally inactive means, operably in dependent of saiddevice, andadapted upon movement independent thereof in said directionto be operatively connected to said device; actuating instrumentalitiesfor said normally inactive means, arranged to be energized by movementthereoi in said direc tion and thereafter operatively to move said lastmentioned means in the reverse direction; means governed by saidnormally inactive means and arranged upon continued movement oi saidlast mentioned means in said first direction, torelease and positivelyto move said device in said first direction; and a releasable detentnormally arranged and positioned to hold said device near the extreme ofits travel in the said first direction, against movement in said reversedirection.

3. Actuating means for a rotary device adapted for reciprocativemovement, em-

bodying. in combination with said device; releasable means normallyarranged to check full movement of sait device in one direction;normally inactive means, operably independent of said device, andadapted, upon movement independent thereof in said direction, to beoperatively connected to said device; actuating instrumentalities forsaid normally i active means arranged to be energized by movementthereof in said direction and thereafter operatively to move said lastmentioned means in the reverse direction; means governed by saidnormally inactive means and arranged upon continued movement of saidlast mentioned means in said first direction, to release and positivelyto move said device in said first direction; and a releasable detentnormally arranged and positioned to ill) hold said device, near theextreme of its travel in the first said direction, against movement insaid reverse direction; together With automatic means cperativelycontrolled by movement of said normally inactive means in said firstdirection and adapted to cause a releasing movement of said detent.

l. Aetuating means for a rotary device adapted for reciprocativemovement embodying, in combination with said device;'oppositely disposedradial arms rigidly fixed to said device and adapted for limited,oscillatory movement; a movable stop extension carried by one of saidarms and normally positioned to check full movement of said device inone direction; a latch member car'- ried by the other of said arms,forming an actuating extension therefor; an oscillatory dog member,concentrically pivoted with the said device and arranged to be normallyinactive and operably independent thereof, the said dog member having aradially ex tending portion adapted upon rotation of the dog member insaid direction to automatically effect engagement thereof with saidlatch member, whereby rotation of said dog member in the reversedirection may cause similar rotation of the said device, and having anoppositely extending trigger arm arranged upon further movement of thedog member in said first'direction to trip said stop extension andthereby to release said device for further movement in the said firstdirection, said trigger arm having positive,uni-directional engagementwith the first said device arm for causing such further movement of thedevice; and a releasable detent, normally arranged and positioned tocatch and hold said device, near the extreme of its travel in the firstsaid direction, against movement in said reverse direction.

5. Actuating means for a rotary device adapted for reciprocativemovement embodying, in combination with said device; oppositely disposedradial arms rigidly fixed to said device and adapted for limited,oscillatory movement; a movable stop extension carried by one of saidarms and normally positioned to check full movement of said device inone direction; a latch member carried by the other of said arms, formingan actuating extension therefor; an oscillatory dog member,concentrically pivotedwith the said device and arranged to benormallyiir.

active and operably independent thereof, the said dog member having aradially extending portion adapted upon rotationof the dog member insaid direction to automatically efl'ect engagement thereof with saidlatch member, whereby rotation of said dog memher in the reversedirection may cause similar rotation of the said device, and having anoppositely extending triggerlarm arranged upon further movement of thedog member in said first direction to trip said stop extension andthereby to release said device for further movement in said firstdirection, said trigger arm having positive, uni-directional engagementwith the first said device arm for causing such further movement of thedevice; and tensioned resilient means arranged normally to maintain saiddog member in a definite absolute position at its extreme of travel insaid reverse direction and to yieldingly resist move ment of said dogmember in said first direction.

6. r'kctuating means for a rotary device adapted for reciprocativemovement embodying, in combination with said device; oppositely disposedradial arms rigidly fixed to said device and adapted forlimited'oscillatory movement; a movable stop extension carried by one ofsaid'arms and normally positioned to check full movement of said devicein one direction; a latch member carried by the other of said arms,forming an actuating extension therefor; an oscillatory dog member,concentrically pivoted with the said device and arranged to be normallyinactive and operably independent thereof, the said dog member having aradially extending portion adapted, upon rotation of the dog member insaid direction, to automatically effect engagement thereof with saidlatch member whereby rotation of said dog member in the reversedirection may cause similar rotation of the said device, and having anoppositely extending trigger arm arranged upon further movement of thedog member in said first direction to trip said stop extension andthereby to release said device for further movement in the said firstdirection, said trigger arm having positive, uni-directional engagementwith the first said device arm for causing such further movement of thedevice; tensioned resilient means arranged normally to maintain said dogmember in a definite absolute position at its extreme of travel in saidreverse direction and to yieldingly resist movement of said dog memberin said first direction; a releasable detent, normally arranged andpositionedto catch and hold said device near the extreme of its travelin thefirst said direction against movement in said reverse direction;and automatic means controlled by movement of said do member to the saidextreme of its travel in said first direction, and adapted to causerelease of said dog member from said detent.

7. Actuating means for a reciprocative device arranged for free,limited, reversing movement, embodying, in combination with said device,oppositely extending radial arms therefor; a fixed stop to limitmovement thereof in one direction, and releasable stop means to limitmovement thereof in the opposite direction and including a tensioned dogpivoted on one of said arms of said device; a concentrically pivoteddevice arranged for independent reciprocative move ment, having meanspositively limiting movement thereoi in said first mentioned directionand tensioned against said movement in said opposite direction; means,including a second, tensioned, pivoted dog on said first mentioneddevice, to latch said two devices together for movement in said firstmentioned direction, and upon movement of said second mentioned devicein said opposite direction; means controlled by said second mentioneddevice arranged to re leasably move said first mentioned dog uponcontinuous movement of said second mentioned device in said oppositedirection, said two devices being provided with an interlockingformation whereby continued movement of said second mentioned deviceimparts movement in the same direction to said first mentioned device;releasable detent means, including a member carried by said secondmentioned device and arranged to restrain movement of said second mentioned device and the carried first mentioned device in said firstmentioned direction, while permitting engaging movement between thedetent members in the opposite direction; and devices controlled by themovement of said second mentioned device in said opposite direction andadapted to cause the delayed disengagement of said detent means.

8. Actuating .means for a reciprocative device arranged for free,limited, reversing movement, embodying, in combination with the saiddevice oppositely extending radial arms therefor; a fixed stop to limitmove ment thereof in one direction, and releasable stop means to limitmovement thereof in the opposite direction and including a tensioned dogpivoted on one of said arms of said device; a concentrically pivoteddevice arranged for independent, reciprocative movement, having meanspositively limiting movement thereof in said first mentioned directionand tensioned against movement in said opposite direction; means,including a second tensioned pivoted dog on said first mentioned device,to latch said two devices together for movement in said first mentioneddirection; and upon movement of said second mentioned device in saidopposite direction; means controlled by said second mentioned devicearranged to releasably move said first men tioned dog upon continuousmovement of said second mentioned device in said opposite direction,said two devices being provided with an interlocking formation wherebycontinued movement of said second mentioned device imparts movement inthe same direction to said first mentioned device; releasable detentmeans, including a member carried by said second mentioned device andarranged to restrain movement of said second mentioned device and thecarried first mentioned device in said first mentioned direction, whilepermitting engaging movement between the detent members in the oppositedirection; and devices controlled by the movement of said secondmentioned device in said opposite direction and adapted to cause thedelayed disengagement of said detent means;said second pivoted dog onsaid first mentioned device being adapted to be readily actuated todisengage the two devices and permit independent movement of said firstmentioned device in either direction.

9. actuating means for a reciprocative device arranged for free,limited, reversing movement, embodying, in combination with said device,oppositely extending radial arms therefor; a fixed stop to limitmovement thereof in one direction, and releasable stop means tolimit'movement thereof in the opposite direction and including atensioned dog pivoted on one of said arms of said de vice; aconcentrically pivoted device arranged for independent, reciprocative,movement, having means positively limiting movement thereof in saidfirst mentioned direction and tensioned against movement in saidopposite direction; means, including a second tensioned pivoted dog onsaid first mentioned device, to latch the two devices.

together for movement in said first mentioned direction, and uponmovement of said second mentioned device in said opposite eirection;means controlled by said second mentioned device arranged to releasablymove said first mentioned dog upon continuous movement of said secondmentioned device in said opposite direction, said two devices beingprovided with an interlocking "formation whereby continued movement ofsaid second mentioned device imparts movement in the same direction tosaid first mentioned device; releasable detent means, including a membercarried by said second mentioned device and arranged to restrainmovement of said second mentioned device and the carried first mentioneddevice in said first mentioned direction, while permitting engagingmovement between the detent members in the opposite direction; anddevices controlled by the movement of said second mentioned device insaid opposite direction, including a thermostat and means for thermallyenergizing the same; said pivoted dog on said first mentioned devicebeing adapted to be readily actuated to disengage the two devices andpermit independent movement of said first mentioned device in'saidopposite direction.

10. In combination with a rotary device adapted for limitedreciprocative movement; opposite radial extensions fixedly carried bythe device for actuating the same; a member pivoted concentrically withsaid device and normally maintained in a definite, absolute position byresilient means, and adapted when so positioned to permit independent,reciprocative rotation of the said device, the said member being formedand positioned coiiperatively with a latch arrangement carried partly byone of said radial device ex tensions to automatically engage with saidlatch arrangement, thereby to impel the said device in a directiontoward said absolute position of said member when said member is movedfrom such position against the action of said resilient means andreleased; control means suspended one from the end of each radialextension, interconnected near their lower ends, and adapted to causeoscillation of the said device by alternate, unidirectional pullsthereon; together with an independent control means connected to saidmember and arranged to be operatively independent of the first saidcontrol means but structurally associated therewith and guided thereby,and adapted upon actuation thereof to rotate said member from its saidabsolute position.

11. Tension-actuated, valve controlling mechanism, embodying, incombination with a valve stem, an actuating member rotatably mountedthereon and spring-impelled in one direction to a stop-limited rotativeposition; a detent to hold said member under tension of said spring atan opposite extreme rotative position; and means tor releasable drivingengagement between an extension of said valve stem and said member,whereby said stem is rotatively impelled by said member in avalve-closing direction, said means being actuatable to tree said stemfrom said driving engagement so that said stem is adjustableindependently of, and relative to, said member when the latter is in itssaid. stop limited. position.

12. In combination; a burner; a burner valve; a valveactnating memberupon the stem of the VtlVQ; a spring tending to move said member in thedirection of rotation of said valve to a closed position; a fixedeXtension carried by the valve stem; means for releasable engagementbetween said extension and said member whereby said movement of saidextension closes said valve automatially to extinguish the burner; and aseparate valve control device operatively related to said means and.adapted to disengage said extension from said member, whereby said valvemay be operatively adjusted inclependently of said member to regulatesaid burner for continuous operation.

13. In combination; an oscillatory device; oositive stops to limit thefull oscillatory movement thereof; a releasable stop normally operativeto limit the oscillation of said device to less t run its said fullmovement; an actuator member movable relatively to said device andarranged for positive driving engagement therewith in one direction ofoscillation, and "for releasable driving engagement therewith in theother direction of oscillation whereby said device is also operableindependently of, and relatively to, said member; a spring tending torotate said member in said other direction of oscillation; means wherebyrotation of said member in said first direction o1 oscillation treessait device from said releasable stop to permit "full movement of saiddevice; and an automatic detent normally arranged to catch and hold saidmember when the latter is tensioned by said spring and in drivingengagement with said device, thereby to govern automatic actuation oithe latter.

14. A gas valve control apparatus em-.

bodying, in combination; a gas port control element rotatable betweennormal limits oi movement; an actuator member for said element adaptedto impel the latter beyond its said normal limits; separate controlmeans for said element whereby the latter may be establishedindependently of said member in certain port governing positions withinits said normal limits of movement; a separate control extension forsaid actuator member whereby the latter may be moved to impel saidelement to a designed position beyond its said normal limits; mechanismadapted automatically to return said element from its said designedposition; and normally inactive, slow-acting instrumentalities, adaptedto render said mechanism operative a substantial interval of time aftersaid instrumentalities are energized; together with means wherebymovement of said member to its said designed position energizes saidinstrumentalities.

Signed. in Boston, Massachusetts, this 19th day of August, 1916.

RAYMOND D. SMITH. Witnesses:

J. E. BLAGKMAN, JAMES D. GORDON.

